The length of the belt matches the smaller end of the size. For example, a Medium (30-32) measures 30 inches around. When the bottles of the belt are full, the added weight creates more stretch, expanding the belt. The Velcro closure allows you to adjust the belt a couple inches to create the perfect fit.

For women Keep in mind these measurements are for your natural waist, which is much higher than where most women wear their pants these days. If you like to wear your Fuel Belt lower on your waist or hips, measure that area accordingly. (Typically it means you have to go up a size.)

Our 2005 Fuel Belts run SMALLER than previous years. You may need to go up a size from previous models, but you should measure your waist to be sure.